Picked Up The New Boat Today

[dubob]

You nailed it, a vinegar based solution is all you need, just go to the dollar store and get a spray bottle buy a gallon of white vinegar. I mix mine in a 50/50 of vinegar and water, others use a different mixture but it cuts that crud off your boat like no ones business.

I've always used 1/4 cup vinegar to one quart of water.  Removes all the hard water spots IF and ONLY IF you clean it after every trip.  For the really tough deposits, the commercial product, CLR, mixed half & half with water, will clean off those really hard deposits.  The 'Hot Sauce' product also works very well but costs way more than vinegar & water.